1398523620 has 48 divisors (see below), whose sum is σ = 4217088960. Its totient is φ = 344251776.

The previous prime is 1398523603. The next prime is 1398523673. The reversal of 1398523620 is 263258931.

1398523620 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 895710 + ... + 897269.

It is an arithmetic number, because the mean of its divisors is an integer number (87856020).

Almost surely, 2^1398523620 is an apocalyptic number.

1398523620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1398523620 is an abundant number, since it is smaller than the sum of its proper divisors (2818565340).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1398523620 is a wasteful number, since it uses less digits than its factorization.

1398523620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1793004 (or 1793002 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 1398523620 is about 37396.8397060500. The cubic root of 1398523620 is about 1118.2955632973.

The spelling of 1398523620 in words is "one billion, three hundred ninety-eight million, five hundred twenty-three thousand, six hundred twenty".